ToString Method (Double)

Convert.ToString Method (Double)

.NET Framework 1.1

Converts the value of the specified double-precision floating point number to its equivalent String representation.

[Visual Basic]
Overloads Public Shared Function ToString( _
   ByVal value As Double _
) As String
public static string ToString(
 double value
public: static String* ToString(
 double value
public static function ToString(
   value : double
) : String;


A double-precision floating point number.

Return Value

The String equivalent of the value of value.


This implementation is identical to Double.ToString.


[Visual Basic, C#, C++] The following code sample illustrates the conversion of a Double to a String, using ToString.

[Visual Basic] 
Public Sub ConvertDoubleString(ByVal doubleVal As Double)

    Dim stringVal As String

    ' A conversion from Double to String cannot overflow.       
    stringVal = System.Convert.ToString(doubleVal)
    System.Console.WriteLine("{0} as a String is: {1}", _
                              doubleVal, stringVal)

        doubleVal = System.Convert.ToDouble(stringVal)
        System.Console.WriteLine("{0} as a Double is: {1}", _
                                  stringVal, doubleVal)
    Catch exception As System.OverflowException
        System.Console.WriteLine( _
            "Overflow in String-to-Double conversion.")
    Catch exception As System.FormatException
        System.Console.WriteLine( _
            "The string is not formatted as a Double.")
    Catch exception As System.ArgumentException
        System.Console.WriteLine("The string is null.")
    End Try

End Sub

public void ConvertDoubleString(double doubleVal) {
    string    stringVal;     

    // A conversion from Double to string cannot overflow.       
    stringVal = System.Convert.ToString(doubleVal);
    System.Console.WriteLine("{0} as a string is: {1}",
        doubleVal, stringVal);

    try {
        doubleVal = System.Convert.ToDouble(stringVal);
        System.Console.WriteLine("{0} as a double is: {1}",
            stringVal, doubleVal);
    catch (System.OverflowException) {
            "Conversion from string-to-double overflowed.");
    catch (System.FormatException) {
            "The string was not formatted as a double.");
    catch (System.ArgumentException) {
            "The string pointed to null.");


   void ConvertDoubleString(double doubleVal)
      String*    stringVal;     

      // A conversion from Double to String* cannot overflow.       
      stringVal = System::Convert::ToString(doubleVal);
      System::Console::WriteLine(S" {0} as a String* is: {1}",
         __box(doubleVal), stringVal);

      try {
         doubleVal = System::Convert::ToDouble(stringVal);
         System::Console::WriteLine(S" {0} as a double is: {1}",
            stringVal, __box(doubleVal));
      } catch (System::OverflowException*) {
         System::Console::WriteLine(S"Conversion from String*-to-double overflowed.");
      } catch (System::FormatException*) {
         System::Console::WriteLine(S"The String* was not formatted as a double.");
      } catch (System::ArgumentException*) {
         System::Console::WriteLine(S"The String* pointed to null.");

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework, Common Language Infrastructure (CLI) Standard

See Also

Convert Class | Convert Members | System Namespace | Convert.ToString Overload List

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